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   75025篇
  免费   6600篇
  国内免费   2406篇
耳鼻咽喉   826篇
儿科学   1446篇
妇产科学   861篇
基础医学   14821篇
口腔科学   1402篇
临床医学   4700篇
内科学   11604篇
皮肤病学   1791篇
神经病学   5137篇
特种医学   1192篇
外国民族医学   18篇
外科学   6285篇
综合类   8782篇
现状与发展   11篇
预防医学   3050篇
眼科学   905篇
药学   11986篇
  3篇
中国医学   3136篇
肿瘤学   6075篇
  2023年   1345篇
  2022年   1738篇
  2021年   2934篇
  2020年   2564篇
  2019年   3135篇
  2018年   3189篇
  2017年   2997篇
  2016年   2553篇
  2015年   3083篇
  2014年   4281篇
  2013年   5052篇
  2012年   4531篇
  2011年   5284篇
  2010年   4092篇
  2009年   4072篇
  2008年   3736篇
  2007年   3457篇
  2006年   3107篇
  2005年   2663篇
  2004年   2511篇
  2003年   2075篇
  2002年   1568篇
  2001年   1230篇
  2000年   1230篇
  1999年   920篇
  1998年   804篇
  1997年   817篇
  1996年   657篇
  1995年   756篇
  1994年   657篇
  1993年   553篇
  1992年   448篇
  1991年   423篇
  1990年   361篇
  1989年   307篇
  1988年   251篇
  1987年   240篇
  1986年   238篇
  1985年   545篇
  1984年   657篇
  1983年   419篇
  1982年   480篇
  1981年   390篇
  1980年   344篇
  1979年   295篇
  1978年   240篇
  1977年   184篇
  1976年   195篇
  1975年   131篇
  1974年   94篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
《Vaccine》2022,40(52):7604-7612
Background and ObjectiveVaccine uptake during pregnancy remains low. Our objectives were to describe 1) development and adaptation of a clinician communication training intervention for maternal immunizations and 2) obstetrics and gynecology (ob-gyn) clinician and staff perspectives on the intervention and fit for the prenatal care context.MethodsDesign of the Motivational Interviewing for Maternal Immunizations (MI4MI) intervention was based on similar communication training interventions for pediatric settings and included presumptive initiation of vaccine recommendations (“You’re due for two vaccines today”) combined with motivational interviewing (MI) for hesitant patients. Interviews and focus group discussions were conducted with ob-gyn clinicians and staff in five Colorado clinics including settings with obstetric physicians, certified nurse midwives (CNMs), and clinician-trainees. Participants were asked about adapting training to the ob-gyn setting and their implementation experiences. Feedback was incorporated through iterative changes to training components.ResultsInterview and focus group discussion results from participants before (n = 3), during (n = 11) and after (n = 25) implementation guided intervention development and adaptation. Three virtual, asynchronous training components were created: a video and two interactive modules. This virtual format was favored due to challenges attending group meetings; however, participants noted opportunities to practice skills through role-play were lacking. Training modules were adapted to include common challenging vaccine conversations and live-action videos. Participants liked interactive training components and use of adult learning strategies. Some participants initially resisted the presumptive approach but later found it useful after applying it in their practices. Overall, participants reported that MI4MI training fit well with the prenatal context and recommended more inclusion of non-clinician staff.ConclusionsMI4MI training was viewed as relevant and useful for ob-gyn clinicians and staff. Suggestions included making training more interactive, and including more complex scenarios and non-clinician staff.  相似文献   
3.
4.
5.
6.
7.
PurposeAccording to the social determinants of health framework, income inequality is a potential risk factor for adverse mental health. However, few studies have explored the mechanisms suspected to mediate this relationship. The current study addresses this gap through a mediation analysis to determine if social support and community engagement act as mediators linking neighbourhood income inequality to maternal anxiety and depressive symptoms within a cohort of new mothers living in the City of Calgary, Canada.MethodsData collected at three years postpartum from mothers belonging to the All Our Families (AOF) cohort were used in the current study. Maternal data were collected between 2012 and 2015 and linked to neighbourhood socioeconomic data from the 2006 Canadian Census. Income inequality was measured using Gini coefficients derived from 2006 after-tax census data. Generalized structural equation models were used to quantify the associations between income inequality and mental health symptoms, and to assess the potential direct and indirect mediating effects of maternal social support and community engagement.ResultsIncome inequality was not significantly associated with higher depressive symptoms (β = 0.32, 95%CI = −0.067, 0.70), anxiety symptoms (β = 0.11, 95%CI = −0.39, 0.60), or lower social support. Income inequality was not associated with community engagement. For the depression models, higher social support was significantly associated with lower depressive symptoms (β = −0.13, 95%CI = −0.15, −0.097), while community engagement was not significantly associated with depressive symptoms (β = 0.059, 95%CI = −0.15, 0.27). Similarly, for the anxiety models, lower anxiety symptoms were significantly associated with higher levels of social support (β = −0.17, 95%CI = −0.20, −0.13) but not with higher levels of community engagement (β = 0.14, 95%CI = −0.14, 0.41).ConclusionThe current study did not find clear evidence for social support or community engagement mediating the relationship between neighbourhood income inequality and maternal mental health. Future investigations should employ a broader longitudinal approach to capture changes in income inequality, potential mediators, and mental health symptomatology over time.  相似文献   
8.
9.
《Immunity》2022,55(9):1609-1626.e7
  1. Download : Download high-res image (179KB)
  2. Download : Download full-size image
  相似文献   
10.
ObjectiveWe encountered a case of high-grade serous carcinoma (HGSC) of the ovary which recurred as carcinosarcoma of the sigmoid colon. Tumor cells of both the primary carcinoma and the secondary carcinosarcoma were negative for estrogen receptor (ER), WT-1, and PAX8. It is well known that most ovarian carcinomas arising from the Müllerian duct are immunoreactive for these biologic parameters. To our knowledge, this is the first case report that provides the results of immunohistochemical analysis of WT-1 and PAX8 for a primary carcinoma and recurrent carcinosarcoma.Case reportA 61-year-old woman had an advanced right ovarian HGSC. After a primary debulking surgery (hysterectomy, bilateral salpingo-oophorectomy and omentectomy) and adjuvant chemotherapy, complete remission was achieved. However, four and a half years later, a tumor arising beside the sigmoid colon was detected. A tumorectomy was performed through combined partial resection of the ileum and sigmoid colon. Microscopically, the tumor was diagnosed as carcinosarcoma of the sigmoid colon, which had originated from HGSC of the ovary. Interestingly, the malignant cells of the primary carcinoma and epithelial components of the recurrent carcinosarcoma were negative for ER, WT-1, and PAX8. These immunohistochemical features were unusual. Three cycles of chemotherapy with the previously used regimen and three additional cycles of doxorubicin and ifosfamide combination chemotherapy were administered. Currently, 3 years after the final chemotherapy was administered, the patient remains healthy.ConclusionHGSC of the ovary can recur as carcinosarcoma. Tumor cells of the primary HGSC without ER, WT-1, and PAX8 expression may have dedifferentiated and recurred as carcinosarcoma.  相似文献   
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