全文获取类型
收费全文 | 9563篇 |
免费 | 738篇 |
国内免费 | 196篇 |
专业分类
耳鼻咽喉 | 26篇 |
儿科学 | 286篇 |
妇产科学 | 178篇 |
基础医学 | 950篇 |
口腔科学 | 75篇 |
临床医学 | 1985篇 |
内科学 | 874篇 |
皮肤病学 | 88篇 |
神经病学 | 956篇 |
特种医学 | 62篇 |
外国民族医学 | 1篇 |
外科学 | 277篇 |
综合类 | 1207篇 |
现状与发展 | 2篇 |
一般理论 | 1篇 |
预防医学 | 2025篇 |
眼科学 | 23篇 |
药学 | 599篇 |
3篇 | |
中国医学 | 615篇 |
肿瘤学 | 264篇 |
出版年
2024年 | 21篇 |
2023年 | 200篇 |
2022年 | 372篇 |
2021年 | 476篇 |
2020年 | 505篇 |
2019年 | 471篇 |
2018年 | 447篇 |
2017年 | 382篇 |
2016年 | 340篇 |
2015年 | 343篇 |
2014年 | 726篇 |
2013年 | 775篇 |
2012年 | 594篇 |
2011年 | 621篇 |
2010年 | 441篇 |
2009年 | 467篇 |
2008年 | 472篇 |
2007年 | 428篇 |
2006年 | 378篇 |
2005年 | 266篇 |
2004年 | 226篇 |
2003年 | 201篇 |
2002年 | 147篇 |
2001年 | 131篇 |
2000年 | 125篇 |
1999年 | 84篇 |
1998年 | 87篇 |
1997年 | 70篇 |
1996年 | 81篇 |
1995年 | 65篇 |
1994年 | 69篇 |
1993年 | 66篇 |
1992年 | 45篇 |
1991年 | 40篇 |
1990年 | 37篇 |
1989年 | 20篇 |
1988年 | 35篇 |
1987年 | 21篇 |
1986年 | 26篇 |
1985年 | 35篇 |
1984年 | 34篇 |
1983年 | 19篇 |
1982年 | 17篇 |
1981年 | 16篇 |
1980年 | 20篇 |
1979年 | 16篇 |
1978年 | 11篇 |
1977年 | 9篇 |
1976年 | 10篇 |
1975年 | 5篇 |
排序方式: 共有10000条查询结果,搜索用时 250 毫秒
31.
Heung-Don Cho Nam-Young Kim Hyo-wook Gil Du-shin Jeong Sae-yong Hong 《Journal of Korean medical science》2015,30(7):974-978
The frequency and extent of the existence of a familial suicide prevention plan may differ across cultures. The aim of this work was, therefore, to determine how common it was for families to develop a suicide prevention plan and to compare the main measures used by families with and without such a plan, after an attempt to commit suicide was made by a member of a family living in a rural area of Korea. On the basis of the presence or absence of a familial suicide prevention plan, we compared 50 recruited families that were divided into 2 groups, with Group A (31 families) employing a familial suicide prevention plan after a suicide attempt by a family member, and Group B (19 families) not doing so. The strategy that was employed most frequently to prevent a reoccurrence among both populations was promoting communication among family members, followed by seeking psychological counseling and/or psychiatric treatment. Contrary to our expectation, the economic burden from medical treatment after a suicide attempt did not influence the establishment of a familial suicide prevention plan. It is a pressing social issue that 38% (19 of 50) of families in this study did not employ a familial suicide prevention plan, even after a family member had attempted suicide. Regional suicide prevention centers and/or health authorities should pay particular attention to these patients and their families. 相似文献
32.
目的:考察中学生物质主义价值观与家庭应激源、亲子依恋的关系。方法:采用青少年物质主义价值观量表、家庭压力量表和青少年父母与同伴依恋问卷中的父母分问卷,对江苏某高中1344名学生进行调查。结果:家庭应激源显著正向预测中学生物质主义价值观水平,亲子依恋显著负向预测中学生物质主义价值观水平;中介回归分析结果显示,在考虑亲子依恋的影响时,家庭应激源对中学生物质主义价值水平的预测作用虽仍显著但已减弱。亲子依恋在家庭应激源与物质主义价值观之间的间接效应占总效应的13.30%,其90%置信区间为[0.003,0.024],P0.05。结论:亲子依恋在中学生家庭应激源和物质主义价值观水平之间起部分中介作用。 相似文献
33.
Anli Leng Caifen Xu Stephen Nicholas Jennifer Nicholas Jian Wang 《Archives of Psychiatric Nursing》2019,33(1):23-29
Purpose
To evaluate the quality of life (QoL) and social support among family caregivers of a family member with a mental illness and to identify factors associated with the QoL.Methods
This is a cross-sectional study, where participants were recruited and independently interviewed using a questionnaire, consisting of demographic characteristics, the Medical Outcome Survey SF-36 form, and social support rating scales. Multiple stepwise regression analysis was used to analyse the factors related to QoL.Results
181 family caregivers were recruited in Shandong province, China. On a composite QoL score, family caregivers perceived that their QoL was poor (68.3), especially in the aspects of role-physical (61.3), role-emotional (57.6) and mental health (63.0). We also found family caregivers received low social support, especially in objective support and utilization of social support. Patient's illness state, care time, financial burden and objective support were significantly correlated to caregivers' QoL in the physical component score (PCS). Patient's illness state, patient's marital status, family monthly income, caregiver's knowledge about the illness, caregivers coordinating caring, life and work, subjective support received and utility of support were significantly associated with caregivers' QoL in the mental component score (MCS).Conclusions
Social support had a significant correlation with caregivers' QoL. Caregivers should be encouraged to request assistance from other family members and friends in providing care, especially when caregivers are unemployed or long-time carers. Mental health education campaigns and helping families to maintain and enhance a supportive social network may provide useful means to improve caregivers' QoL. 相似文献34.
《Journal of the Academy of Nutrition and Dietetics》2019,119(12):2028-2040
BackgroundDiet and eating habits during youth have implications on diet and eating habits during adulthood, however, little longitudinal research has examined sexual orientation and gender expression differences in diet.ObjectiveOur aim was to examine sexual orientation and gender expression differences in diet quality and eating habits from adolescence to young adulthood.DesignData across multiple time points from the longitudinal Growing Up Today Study cohorts (1997 to 2011) were used.Participants/settingParticipants (n=12,880; aged 10 to 23 years) were the children of women from the Nurses’ Health Study II cohort.Main outcome measuresDiet quality scores were assessed using the Alternative Healthy Eating Index-2010. In addition, breakfast consumption (≥5 days/wk) and family dinners (≥5 days/wk) were assessed.Statistical analyses performedMultivariable generalized estimating equation regression models were fit to estimate sexual orientation and gender expression differences in diet quality scores, breakfast consumption, and family dinners, stratified by sex assigned at birth over available repeated measures.Results“Gender-nonconforming” males had significantly higher diet quality scores than “very gender-conforming” males (P<0.05). Diet quality scores did not differ by gender expression among females. “Mostly heterosexual” females and gay males had higher diet quality scores than their same-sex completely heterosexual counterparts (P<0.05). Adjustment for mother’s diet quality scores attenuated effects, except for gay males (P<0.05). “Gender-nonconforming” females were less likely to consume breakfast than “very gender-conforming” females (P<0.05). Similar results were found for “mostly heterosexual” and bisexual compared to completely heterosexual females. There were no gender expression or sexual orientation differences in family dinners among males and females.ConclusionsSexual orientation and gender expression have independent effects on diet quality scores and eating habits for both males and females. Very gender-conforming and completely heterosexual males had the lowest diet quality scores compared to other gender expression and sexual orientation groups. Additional research to explore the effects of sexual orientation and gender expression on diet-related health is needed to build upon these findings. 相似文献
35.
《ALTER. European Journal of Disability research, Journal europeen de recherche sur le handicap》2019,13(2):113-125
The aim of this article is to examine how different ideological perspectives on Swedish disability policy, are reflected in the experiences of disabled people and their families personal assistants. Personal assistance provided within the family can be seen as a hybridization between publicly regulated and paid work performed in the private family sphere, and thus conflicting norms and practices may coexist. In Sweden, family members of the assistant user can be employed as paid personal assistants. Many users combine personal assistance from family members with non-family assistance. Approximately 20–25% of the employed personal assistants are relatives of the assistance users. The empirical data consists of qualitative interviews with seventeen adult users and twenty-three family members employed as PAs with different types of family ties; parent-child relationships, sibling relationships and partner relationships. The findings show that family assistance could entail advantages such as personalised services, to combine instrumental and emotional assistance as well as achieving a power-balance between the parties. But there were also disadvantages, such as unwanted or enforced dependency, with a risk for both parties to be ‘locked up’ in the family. In an overall analysis, we distinguished three broad approaches towards family assistance, family as a substitute, family as a supplement and family first. 相似文献
36.
Taichi Goto Gojiro Nakagami Takeo Minematsu Sanai Tomida Masamichi Shinoda Koichi Iwata Hiromi Sanada 《Experimental dermatology》2019,28(9):1010-1016
Cutaneous wound pain causes physical and psychological stress for patients with wounds. Previous studies reported that stress induces hyperalgesia and deteriorates wound healing. However, the effect of the stress response such as in hypothalamic‐pituitary‐adrenal (HPA) axis on local wound area is unclear. We aimed to investigate the effects of a stress response on the mechanical withdrawal threshold in the local wound area and describe the identification of a wound pain exacerbation. We topically injected adrenocorticotropic hormone (ACTH) into the granulation tissue of full‐thickness cutaneous wound model rats on the fifth day postwounding and measured the mechanical withdrawal thresholds, cytochrome P450 2Bs levels and concentration of 5,6‐epoxyeicosatrienoic acid in wound exudate. We found that ACTH induced mechanical hypersensitivity at 4 and 6 hours after injection (P = .004 and .021, respectively), and increased gene expression of cytochrome P450 2B12 expression (P = .046). Concentration of 5,6‐EET in the wound exudate was moderately correlated with the mechanical withdrawal threshold (r = ?.630). Finally, the mechanical withdrawal threshold in the 5,6‐EET group was significantly lower than that in the control group at 2 hours after the injection (P = .015). We propose that 5,6‐EET is one of the most promising contributors to the wound pain exacerbation. These findings could guide clinical wound and pain management. 相似文献
37.
38.
Lauren Thaete 《Progress in Palliative Care》2019,27(1):10-13
Effective communication between clinicians, patients, and families at end of life is associated with better clinical outcomes. A large body of literature describes the key skills needed for effective communication. We believe that clinicians could also benefit from communication skills more commonly associated with business or law negotiations. We will demonstrate via analogy (i.e. buying a house) how four key business/law negotiation techniques – 1. Determine your Reservation and Aspiration Value; 2. Separate People from their Positions; 3. Separate Positions from Interests; and 4. Logrolling of Interests – can be applied to a difficult family meeting in a home hospice patient. 相似文献
39.
Kosuke Yoshihara Takayuki Enomoto Daisuke Aoki Yoh Watanabe Junzo Kigawa Nobuhiro Takeshima Hyoe Inomata Kana Hattori Masahisa Jinushi Hitoshi Tsuda Toru Sugiyama 《Cancer science》2020,111(9):3350-3358
Whether germline (g) breast cancer susceptibility gene (BRCA) mutations are located within or outside the ovarian cancer cluster region (OCCR) (1380‐4062 bp for gBRCA1, and between 3249‐5681 bp and 6645‐7471 bp for gBRCA2) may influence risk variations for ovarian cancers. This ad hoc analysis of the CHARLOTTE epidemiological study in Japan assessed the distribution of gBRCA1/2 mutations in patients with newly diagnosed ovarian cancer, and investigated an association between gBRCA1/2 mutation locations and ovarian cancer risk. Differences in patient background and clinical characteristics in subgroups stratified by gBRCA1/2 mutation locations were also evaluated. We analyzed the data of 93 patients (14.7%) from the CHARLOTTE study who were positive for gBRCA1/2 mutations. After excluding 16 cases with L63X founder mutation, 28 (65.1%) of gBRCA1 mutations were within the OCCR. Of 30 gBRCA2 mutations, 15 (50.0%) were within the OCCR. Of 27 patients (one patient excluded for unknown family history) with gBRCA1 mutations located in the OCCR, 11 (40.7%) had a family history of ovarian cancer; the proportion of patients with a family history of ovarian cancer and gBRCA1 mutations outside the OCCR was lower (13.3%). Sixty percent of patients with gBRCA1 mutations outside the OCCR had a family history of breast cancer; the proportion of patients with a family history of breast cancer and gBRCA1 mutations within the OCCR was relatively lower (33.3%). Understanding the mutation locations may contribute to more accurate risk assessments of susceptible individuals and early detection of ovarian cancer among gBRCA mutation carriers. 相似文献
40.
目的:研究长柱重楼、滇重楼和南重楼的HPLC指纹图谱与其抗肝癌作用的谱效关系,为明确重楼抗肝癌作用的物质基础提供实验依据。方法:采用HPLC建立3种重楼提取物的指纹图谱,流动相乙腈(A)-水(B)梯度洗脱(0~10 min,20%A; 10~20 min,20%~25%A; 20~30 min,25%~30%A; 30~40 min,30%~35%A; 40~50 min,35%~40%A; 50~60 min,40%A; 60~75 min,40%~45%A; 75~80 min,45%~60%A),流速0. 9 m L·min~(-1),检测波长203 nm;利用噻唑蓝(MTT)比色法测定3种重楼提取物对肝癌HepG2细胞的增殖抑制作用,计算半数抑制浓度(IC_(50));运用聚类分析(HCA)和灰色关联度分析(GRA)研究3种重楼指纹图谱和抗肝癌作用的关系,找出对抗肝癌作用贡献较大的成分。结果:在3种重楼的HPLC指纹图谱中,确定其中11个色谱峰为共有峰。作用时间72 h时长柱重楼、滇重楼、南重楼的IC_(50)分别为148. 33,178. 87,208. 09 mg·L~(-1),其中长柱重楼的抗肝癌活性最强。灰色关联度结果显示,滇重楼共有峰中关联度较高的为1~10号峰,长柱重楼共有峰关联度较高的为1~7号峰,南重楼共有峰中关联度较高的为1~4,6~10,N1号峰,与IC_(50)关联度均0. 7。各重楼变量的聚类分析结果显示,可与IC_(50)聚为一类的色谱峰的关联度均 0. 7。结论:建立了3种重楼的HPLC指纹图谱,重复性良好。3种重楼中的1~4,6和7号色谱峰对抗肝癌药效贡献最大。 相似文献