全文获取类型
收费全文 | 68354篇 |
免费 | 7128篇 |
国内免费 | 1895篇 |
专业分类
耳鼻咽喉 | 394篇 |
儿科学 | 1283篇 |
妇产科学 | 865篇 |
基础医学 | 4919篇 |
口腔科学 | 1816篇 |
临床医学 | 7179篇 |
内科学 | 7618篇 |
皮肤病学 | 819篇 |
神经病学 | 4534篇 |
特种医学 | 2434篇 |
外国民族医学 | 7篇 |
外科学 | 4682篇 |
综合类 | 8764篇 |
现状与发展 | 6篇 |
一般理论 | 4篇 |
预防医学 | 9871篇 |
眼科学 | 706篇 |
药学 | 9245篇 |
51篇 | |
中国医学 | 8319篇 |
肿瘤学 | 3861篇 |
出版年
2024年 | 260篇 |
2023年 | 1452篇 |
2022年 | 2257篇 |
2021年 | 2861篇 |
2020年 | 2892篇 |
2019年 | 2672篇 |
2018年 | 2572篇 |
2017年 | 2660篇 |
2016年 | 2612篇 |
2015年 | 2335篇 |
2014年 | 5220篇 |
2013年 | 5233篇 |
2012年 | 4475篇 |
2011年 | 4706篇 |
2010年 | 3582篇 |
2009年 | 3244篇 |
2008年 | 3504篇 |
2007年 | 3582篇 |
2006年 | 3092篇 |
2005年 | 2632篇 |
2004年 | 2154篇 |
2003年 | 1892篇 |
2002年 | 1545篇 |
2001年 | 1357篇 |
2000年 | 1137篇 |
1999年 | 953篇 |
1998年 | 682篇 |
1997年 | 740篇 |
1996年 | 565篇 |
1995年 | 586篇 |
1994年 | 516篇 |
1993年 | 404篇 |
1992年 | 427篇 |
1991年 | 359篇 |
1990年 | 314篇 |
1989年 | 274篇 |
1988年 | 260篇 |
1987年 | 233篇 |
1986年 | 179篇 |
1985年 | 176篇 |
1984年 | 148篇 |
1983年 | 106篇 |
1982年 | 110篇 |
1981年 | 83篇 |
1980年 | 90篇 |
1979年 | 57篇 |
1978年 | 43篇 |
1977年 | 39篇 |
1976年 | 30篇 |
1975年 | 25篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
完美主义与基督教信仰 总被引:2,自引:0,他引:2
訾非 《国际中华应用心理学杂志》2006,3(3):209-212
目的 考察个体的宗教信仰与完美主义心理之间的关系。方法 采用质的研究方法,对两位受访者(分别为功能障碍型完美主义与健康的完美主义)追行个案研究。结果 两名受访者的基督教(新教)信仰封其完关主义的负面倾向有所矫正,受访者的人际关系和自我认知因为宗教信仰而有所改善。结论 基督教(新教)信仰有利于修正受访者自体表象与权威客体表象的关系。在象征意义上,“上帝”的概念可以理解为“较好的”权威客体表象。 相似文献
62.
目的采用LuxS缺失突变株模型对B型链球菌中数量感应相关分子LuxS的功能及与其相关的自诱导因子-2数量感应通路进行研究,以探索其毒力调控机制。方法采用RT-PCR法、菌落印迹分析、生长曲线测定、cAMP因子测定等方法对该缺失突变菌株的表型特性进行了研究。最后应用哈氏弧菌作为报告菌株,通过生物发光测定法分析了突变株对B型链球菌诱导报告菌株中的生物发光活性的影响。结果发现此缺失突变可导致B型链球菌中scpB基因表达的上调;与野生株相比,突变株的生物发光诱导活性比野生株降低了大约两倍。结论本研究结果证实了LuxS在GBS中AI-2数量感应通路中的重要性,并为GBS中毒力调控机制的进一步研究提供了新的线索。 相似文献
63.
Urodynamic studies in the evaluation of young men presenting with lower urinary tract symptoms 总被引:1,自引:0,他引:1
AIM: To evaluate the usefulness of urodynamic study in young men with lower urinary tract symptoms (LUTS). METHODS: We reviewed the charts of 50 men with LUTS aged 50 years and below. Those with neurological diseases, urethral trauma or strictures were excluded. All underwent multichannel urodynamic studies (UDS). The pre- and post-UDS diagnoses and treatment modalities were compared. RESULTS: Mean age was 38.1 years (17-49). The main pre-UDS diagnoses included prostatitis in seven (14%), overactive bladder in seventeen (34%) and benign prostatic hyperplasia in nine (18%). Pre-UDS management ranged from anticholingeric agents for thirteen (26%), alpha-adrenergic antagonists for nine (18%), antibiotics for six (12%). Abnormal UDS were noted in 36 (72%), including detrusor overactivity in 9 (18%), detrusor underactivity/acontractility in 5 (10%) and bladder outlet obstruction in 21 (42%). Fourteen (28%) had primary bladder neck dysfunction and five (10%) had benign prostatic hyperplasia. Post-UDS management included anticholingeric agents for ten (26%), alpha-adrenergic antagonists for seventeen (34%), catheterization for four (10%), behavioral therapy for three (6%), surgery for three (6%). None were prescribed antibiotics. Following UDS, the diagnosis had to be updated in 40 (80%) and concomitant change in management was required in 34 (68%). CONCLUSION: Young men presenting with LUTS have different underlying etiologies. Clinical diagnosis and treatment are often empiric and inaccurate. Urodynamic study is useful in the evaluation of this group of patients as it aids in arriving at an accurate diagnosis and guides treatment therapy. 相似文献
64.
65.
目的比较2%强化戊二醛(下称戊二醛)气雾熏蒸法与浸泡消毒法消毒吸痰管的效果.方法消毒按5周期(1个周期12 d)进行,每周期将200根使用过的吸痰管经初步处理,即5% 84消毒液浸泡30 min后清水冲洗干净晾干.将每周期200根吸氮管随机均分为实验组和对照组,实验组采用戊二醛原液气雾熏蒸法消毒4 h,对照组采用戊二醛原液浸泡消毒30 min,12 d为1个周期.两组分别于第1、6、12天对消毒后的吸痰管及消毒过程中的戊二醛采样行细菌菌落数计数,并观察有无细菌生长.结果两组每周期第1、6天吸痰管和消毒液标本均未检测出细菌,且无致病微生物生长;每周期第12天对照组吸痰管和消毒液标本均检测出细菌,实验组未检测出细菌.结论气雾熏蒸法消毒灭菌效果可靠,具有节约开支、使用方便、有利于吸痰管的保存与放置等优点. 相似文献
66.
AIMS: To establish all-cause and cause-specific death rates, and risk factors for mortality in insulin-treated diabetic individuals living in the province of Canterbury, New Zealand. METHODS: Insulin-treated diabetic subjects (n = 995) on the Canterbury Diabetes Registry were followed up over 15 years and vital status determined. Death rates were standardized and hazard regression was used to model the effects of demographic covariates on relative survival time. RESULTS: There were 419 deaths in 11 226.3 person-years of follow-up with a standardized mortality ratio (SMR) of 2.0 (95% confidence interval (CI) 1.8-2.2). Relative mortality was greatest for the group aged 0-29 years (SMR 3.0 (95% CI 2.4-3.7)). After controlling for diabetes duration and gender, a 10-year increment in age of onset was associated with a 33% decrease in relative hazard (95% CI 29-36%), indicating that excess mortality due to diabetes declines with rising age of onset. After controlling for age of onset and gender, each 10-year increment in duration of diabetes is associated with a 26% decrease in relative hazard (95% CI 24-29%), indicating that with longer survival the mortality hazard approaches the general population hazard. Relative mortalities were increased for cardiovascular, renal and respiratory disease, but not malignancy. Relative mortality from acute metabolic complications was increased in the subgroup with age of onset of diabetes < 30 years and requiring insulin within 1 year of diagnosis. CONCLUSIONS: Mortality rates are high for insulin-treated diabetic individuals relative to the general population. 相似文献
67.
TOMONORI KATO HIROYOSHI SUZUKI AKIRA KOMIYA TAKASHI IMAMOTO YUKIO NAYA TOYOFUSA TOBE TOMOHIKO ICHIKAWA 《International journal of urology》2006,13(7):915-919
AIM: The clinical significance of the urinary white blood cell (U-WBC) count and serum C-reactive protein (CRP) level was evaluated in an effort to improve the efficiency of prostate biopsies. METHODS: We enrolled 228 consecutive patients with serum prostate-specific antigen (PSA) ranging from 3.0 to 20.0 ng/mL, normal digital rectal examination findings, and who underwent prostate biopsies between January 2001 and August 2004. Of these, 157 patients had histologically confirmed benign prostatic disease and the remaining 71 patients had prostate cancer. Patients with a pretreatment U-WBC count < or =3 or >3/high power field were defined as non-pyuria and pyuria, respectively. The patients were also separated into two groups based on the serum CRP level prior to biopsy. Several clinical factors were compared among these subgroups. RESULTS: Inflammation was histologically detected at rates of 58.1% and 34.1% in the pyuria and non-pyuria groups, respectively (P = 0.0014). The rates of cancer detection were significantly lower in the pyuria, than in the non-pyuria group (P = 0.0384). The cancer detection rates did not significantly differ according to serum CRP levels prior to biopsy. CONCLUSION: The U-WBC count appears to be a reliable indicator of minute prostatic inflammation. The serum PSA level was elevated in patients with asymptomatic prostatitis. Counting U-WBC is a simple, convenient and non-invasive method that should be valuable part of routine urological examinations. 相似文献
68.
广龙昊膏药对大鼠腰椎间盘突出模型细胞因子IL-1、NO及组织胺的影响 总被引:2,自引:1,他引:1
为探讨IL-1、NO及组织胺在腰椎间盘突出中的作用及广龙昊膏药的治疗效果,将60只大鼠造模并随机分为正常组(A组)、造模组(B组)、广龙昊膏药组(C组)和奇正止痛膏组(D组),观察其神经根周围局部组织中IL-1、NO及组织胺的含量。结果显示,B组中的IL-1、NO及组织胺较A组显著升高(P〈0.01)。C组、D组较B组明显下降(P〈0.01)。表明大鼠腰椎间盘突出模型中细胞因子IL-1、NO及组织胺明显增加可能是腰椎间盘突出中的潜在始动或促进因素,而C组能显著降低神经根局部中IL-1、NO及组织胺的含量,说明广龙昊膏药作用部分是通过抑制炎性细胞因子的活性实现的。 相似文献
69.
目的 :探讨大鼠胃粘膜与急性胃粘膜损伤之间的关系。方法 :采用原子吸收光谱分析法 ,测定胃粘膜Ca2 +含量。结果 :胃粘膜损伤程度随应激时间延长而加重 ,胃粘膜Ca2 + 含量却下降 ,二者呈明显负相关 ,但是 ,CaCl2 预应激或应用钙通道阻断剂 ,可减轻胃粘膜损伤程度。结论 :Ca2 + 在急性胃粘膜损伤中有一定的作用。 相似文献
70.