首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   26128篇
  免费   2718篇
  国内免费   426篇
耳鼻咽喉   72篇
儿科学   545篇
妇产科学   1103篇
基础医学   2354篇
口腔科学   126篇
临床医学   4007篇
内科学   1903篇
皮肤病学   113篇
神经病学   8543篇
特种医学   209篇
外科学   964篇
综合类   2930篇
现状与发展   2篇
一般理论   5篇
预防医学   1794篇
眼科学   62篇
药学   2248篇
  46篇
中国医学   1590篇
肿瘤学   656篇
  2024年   53篇
  2023年   564篇
  2022年   546篇
  2021年   1120篇
  2020年   1286篇
  2019年   1195篇
  2018年   1130篇
  2017年   1213篇
  2016年   1272篇
  2015年   1102篇
  2014年   1741篇
  2013年   2457篇
  2012年   1517篇
  2011年   1544篇
  2010年   1362篇
  2009年   1311篇
  2008年   1259篇
  2007年   1237篇
  2006年   1070篇
  2005年   907篇
  2004年   720篇
  2003年   687篇
  2002年   585篇
  2001年   445篇
  2000年   314篇
  1999年   221篇
  1998年   188篇
  1997年   193篇
  1996年   128篇
  1995年   169篇
  1994年   177篇
  1993年   137篇
  1992年   155篇
  1991年   130篇
  1990年   104篇
  1989年   124篇
  1988年   114篇
  1987年   119篇
  1986年   100篇
  1985年   119篇
  1984年   87篇
  1983年   66篇
  1982年   66篇
  1981年   50篇
  1980年   43篇
  1979年   34篇
  1978年   24篇
  1977年   26篇
  1976年   19篇
  1975年   15篇
排序方式: 共有10000条查询结果,搜索用时 93 毫秒
61.

Purpose

The Maternal Role Attainment Scale Form B (MRAS-Form B) was developed based on Mercer's theory and widely used to assess maternal role attainment among Thai mothers in hospitals. To assess the maternal identity among primiparous adolescent mothers in communities, MRAS-Form B remains indistinguishable due to differences in both mothers' ages and circumstances and was modified to the Maternal Identity Scale (MIS). Therefore, the aim of this study was to examine the validity and reliability of the MIS.

Methods

A cross-sectional study was conducted among 397 primiparous Thai teenagers residing with their infants aged 4–12 months. Data were collected using self-administered questionnaires. Confirmatory factor analysis was performed to confirm the construct validity using Mplus Software.

Results

The overall model provided fit well to the empirical data (χ2/df = 2.23, comparative fit index = .93, Tucker–Lewis index = .92, root mean square error of approximation = .06, standardized root mean square residual = .05). About 33–66% of the variance among MIS items could be explained by three constructs of maternal identity. Convergent validity showed item loadings ranging from .58 to .81; in addition, average variance extracted and composite reliability ranged from .44 to .54 and .82 to .92, respectively. Discriminant validity correlations between constructs were ranging from .74 to .87. The MIS exhibited very good item discrimination values (.52 ≤ corrected item-total correlation ≤.70) and an excellent reliability (Cronbach's α = .95).

Conclusion

Appropriately for community health nursing, the MIS was a valid and reliable tool, assessing maternal identity among primiparous teenage mothers one year after delivery.  相似文献   
62.
气血理论是中医重要理论,妇科疾病应首调其气血,哈氏妇科是全国中医妇科十大流派之一,诊治疾病独具特色,哈孝廉教授宗古人"百病皆在调气血"思想,治疗崩漏、产后身痛、滑胎等妇科常见疾病,疗效显著,值得深入学习与探讨。  相似文献   
63.
沈幼丹  王龙 《新中医》2020,52(6):47-49
目的:观察舒肝解郁胶囊联合礞石滚痰丸改善精神分裂症肝郁痰结证的临床疗效。方法:选取精神分裂症患者120例,按随机数字表法分为2组各60例。对照组予奥氮平治疗;观察组在此基础上加用舒肝解郁胶囊联合礞石滚痰丸治疗。连续治疗8周后,比较2组住院精神患者社会功能评定(SSPI)量表、临床总体印象疗效总评量表病情严重程度(CGI-SI)、阳性与阴性症状量表(PANSS)评分以及临床疗效。结果:与治疗前比较,治疗后2组SSPI量表评分均显著升高,CGI-SI评分均明显降低(P<0.01);观察组治疗后SSPI量表评分明显高于对照组,CGI-SI评分显著低于对照组(P<0.01)。治疗后,2组阳性症状、阴性症状、一般精神病理、PANSS总分均显著减少(P<0.01);与对照组比较,观察组治疗后阳性症状、阴性症状、一般精神病理、PANSS总分下降更明显(P<0.01)。观察组总有效率81.67%,对照组63.79%,差异有统计学意义(P<0.05)。结论:舒肝解郁胶囊联合礞石滚痰丸改善精神分裂症肝郁痰结证疗效确切。  相似文献   
64.
陈雅洁  吴节 《新中医》2020,52(5):124-126
结合中医理论及外界影响因素分析认为,排卵障碍性不孕以"肝气郁结、疏泄失调"为病机,治则立"疏肝解郁、调畅气机"为大法,探讨治疗该病选用肝俞施用龙虎交战针法的理论依据。为针灸治疗排卵障碍性不孕提供新的思路及方法,同时也体现了古典针法创新性的运用。  相似文献   
65.
BackgroundAt ketamine and esketamine doses at which antidepressant doses are achieved, these agents are relatively selective, noncompetitive, N-methyl-D-aspartate receptor antagonists. However, at substantially higher doses, ketamine has shown mu-opioid receptor (MOR–gene symbol: OPRM1) agonist effects. Preliminary clinical studies showed conflicting results on whether naltrexone, a MOR antagonist, blocks the antidepressant action of ketamine. We examined drug-induced or endogenous MOR involvement in the antidepressant and dissociative responses to esketamine by assessing the effects of a functional single nucleotide polymorphism rs1799971 (A118G) of OPRM1, which is known to alter MOR agonist-mediated responses.MethodsParticipants with treatment-resistant depression from 2 phase III, double-blind, controlled trials of esketamine (or placebo) nasal spray plus an oral antidepressant were genotyped for rs1799971. Participants received the experimental agents twice weekly for 4 weeks. Antidepressant responses were rated using the change in Montgomery–Åsberg Depression Rating Scale (MADRS) score on days 2 and 28 post-dose initiation, and dissociative side effects were assessed using the Clinician-Administered Dissociative-States Scale at 40 minutes post-dose on days 1 and 25.ResultsIn the esketamine + antidepressant arm, no significant genotype effect of single nucleotide polymorphism rs1799971 (A118G) on MADRS score reductions was detected on either day 2 or 28. By contrast, in the antidepressant + placebo arm, there was a significant genotype effect on MADRS score reductions on day 2 and a nonsignificant trend on day 28 towards an improvement in depression symptoms in G-allele carriers. No significant genotype effects on dissociative responses were detected.ConclusionsVariation in rs1799971 (A118G) did not affect the antidepressant response to esketamine + antidepressant. Antidepressant response to antidepressant + placebo was increased in G-allele carriers, compatible with previous reports that release of endorphins/enkephalins may play a role in mediating placebo effect.Trial RegistrationNCT02417064 and NCT02418585; www.clinicaltrials.gov  相似文献   
66.
Depression is a heterogeneous disorder with a wide range of presentations. Most patients with depression are seen in primary care, where it is often unrecognized; thus, screening for depression is important. Medical conditions can mimic depression and vice versa. For mild cases of depression, symptom monitoring and nonpharmacologic strategies are generally recommended initially, whereas psychotherapy and antidepressant drugs are first-line treatment for moderate to severe cases. Patients with depression often experience relapse, recurrence, or both, and multiple options are available. Primary care providers are central to screening, diagnosing, and subsequently treating or referring these patients.  相似文献   
67.
目的探讨妊娠晚期孕妇抑郁情绪对新生儿神经行为发育的影响。方法选取2017年1月—2018年12月,收治本院的160例妊娠晚期孕妇抑郁情绪患者一般临床资料,妊娠周期28周以上,对孕妇抑郁情绪进行统计采用爱丁堡抑郁自评量表、负性认知加工偏向量表,对新生儿神经行为进行评估时按照婴儿神经国际量表。结果160例妊娠晚期孕妇抑郁情绪患者中,阳性30例、阴性130例,与阴性妊娠妇女相比,抑郁阳性妊娠妇女负性沉思偏向、负性解释偏向、负性记忆偏向、负性注意偏向均显著较高,差异具有统计学意义(P<0.05)。160例新生儿中,婴儿神经国际量表评分处于临界值为60例,正常值为100例,神经行为异常发生率为37.50%,负性沉思偏向、负性注意偏向与婴儿神经国际临界值呈负相关关系(P<0.05);与抑郁自评量表无明显相关性(P>0.05)。结论妊娠晚期孕妇具有较高抑郁发生率,其中负性认知加工偏向中负性沉思偏向、负性注意偏向与新生儿神经行为发育具有明显相关性。  相似文献   
68.
69.
BackgroundResilience and depression may impact clinical outcomes following primary total joint arthroplasty (TJA). This study aimed to quantify baseline resilience and depression prevalence in patients undergoing primary TJA and evaluate their influence on patient-reported clinical outcomes.MethodsWe prospectively enrolled 98 patients undergoing primary TJA. Exclusion criteria included patients under 18 years of age, undergoing surgery for fracture, or who underwent additional surgery during the study period. Patients completed the Brief Resilience Scale to measure resilience, Patient Health Questionnaire-9 to measure depression, and Patient-Reported Outcomes Measurement Information System-10 to measure global physical and mental health preoperatively and 1 year postoperatively.ResultsPreoperatively, 22% and 15% of patients demonstrated major and mild depression, respectively. High resilience was identified in 34% of patients, normal resilience in 55%, and low resilience in 11%. Preoperative depression correlated with lower resilience, global physical health, and global mental health scores preoperatively as well as at 1 year after surgery (P < .001). Higher levels of preoperative resilience correlated with higher global physical and mental health scores preoperatively and at 1 year postoperatively (P < .001).ConclusionDepression symptoms are common among patients undergoing primary TJA and are associated with worse patient-reported outcomes. Patients with higher levels of resilience have higher global physical and mental health scores before and after TJA. Psychological traits and depression impact clinical outcomes following TJA.  相似文献   
70.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号