全文获取类型
收费全文 | 586篇 |
免费 | 11篇 |
国内免费 | 36篇 |
专业分类
儿科学 | 39篇 |
妇产科学 | 2篇 |
基础医学 | 58篇 |
口腔科学 | 8篇 |
临床医学 | 63篇 |
内科学 | 61篇 |
皮肤病学 | 8篇 |
神经病学 | 3篇 |
特种医学 | 195篇 |
外科学 | 56篇 |
综合类 | 19篇 |
预防医学 | 39篇 |
眼科学 | 11篇 |
药学 | 20篇 |
中国医学 | 1篇 |
肿瘤学 | 50篇 |
出版年
2022年 | 3篇 |
2020年 | 2篇 |
2018年 | 6篇 |
2017年 | 4篇 |
2016年 | 5篇 |
2015年 | 11篇 |
2014年 | 12篇 |
2013年 | 10篇 |
2012年 | 8篇 |
2011年 | 11篇 |
2010年 | 21篇 |
2009年 | 37篇 |
2008年 | 23篇 |
2007年 | 34篇 |
2006年 | 33篇 |
2005年 | 29篇 |
2004年 | 18篇 |
2003年 | 12篇 |
2002年 | 20篇 |
2001年 | 31篇 |
2000年 | 9篇 |
1999年 | 25篇 |
1998年 | 29篇 |
1997年 | 34篇 |
1996年 | 23篇 |
1995年 | 11篇 |
1994年 | 9篇 |
1993年 | 12篇 |
1992年 | 12篇 |
1991年 | 5篇 |
1990年 | 10篇 |
1989年 | 21篇 |
1988年 | 20篇 |
1987年 | 10篇 |
1986年 | 11篇 |
1985年 | 7篇 |
1984年 | 3篇 |
1983年 | 4篇 |
1982年 | 2篇 |
1981年 | 7篇 |
1979年 | 6篇 |
1978年 | 2篇 |
1977年 | 4篇 |
1975年 | 3篇 |
1972年 | 2篇 |
1931年 | 1篇 |
1929年 | 2篇 |
1927年 | 2篇 |
1926年 | 7篇 |
1925年 | 3篇 |
排序方式: 共有633条查询结果,搜索用时 15 毫秒
81.
P Möllborg G Wennergren SG Norvenius B Alm 《Acta paediatrica (Oslo, Norway : 1992)》2011,100(2):226-230
Aim: In spite of several reports of an increased risk of sudden infant death syndrome (SIDS) in connection with bed‐sharing, it is not an uncommon practice. The aim of this study was to examine bed‐sharing at 6 months of age and the factors that are associated with bed‐sharing. Methods: Our cohort comprised 8176 randomly chosen families. At 6 month of age, the families received an invitation to the study, with a questionnaire, which was completed by 5605 families (response rate 68.5%). Results: Of the families, 19.8% bed‐shared. In the multivariate analysis, we found a correlation between breast‐feeding and bed‐sharing (breast‐feeding at 6 months: OR 1.94; 95% CI 1.56, 2.41). Moreover, we found an association with 3+ nightly awakenings at 6 months (2.70; 2.20, 3.32). It was more common to share a bed if the parent was single (2.04; 1.19, 3.51) and less common if the infant was bottle‐fed in the first week (0.70; 0.54, 0.90). Never using a pacifier was associated with a higher frequency of bed‐sharing. Conclusion: We found a correlation between breast‐feeding and bed‐sharing as well as between sleeping problems and a single parent. A lower percentage of infants sleeping in the parental bed were seen in association with formula feeding in the first week after birth. 相似文献
82.
MR imaging of the breast in patients with invasive lobular carcinoma 总被引:17,自引:0,他引:17
Weinstein SP Orel SG Heller R Reynolds C Czerniecki B Solin LJ Schnall M 《AJR. American journal of roentgenology》2001,176(2):399-406
OBJECTIVE: Our objective was to assess the usefulness of MR imaging in patients diagnosed with invasive lobular carcinoma of the breast. MATERIALS AND METHODS: Between July 1993 and September 1999, 32 women (33 cases) diagnosed with pure invasive lobular carcinoma of the breast underwent contrast-enhanced MR imaging examination. One woman was excluded because of lack of follow-up. Correlation was made between the mammographic and sonographic findings, the MR imaging findings, and the final pathology results for the remaining 32 cases. RESULTS: In 18 women who did not undergo excisional biopsy before the MR imaging, MR imaging showed more extensive tumor burden or the detection of the primary lesion that was occult on conventional imaging in seven (38.9%) of 18 women. In nine (50%) of 18 women, MR imaging performed equally as well as mammography and sonography. In one case (5.6%), MR imaging and mammography underestimated disease extent. In another patient (5.6%), MR imaging overestimated tumor burden, although mammography failed to show the cancer. In 14 patients who had excisional biopsy before the MR imaging, residual tumor was shown in eight women (57.1%) with extensive tumor or additional separate foci in five of the eight patients. In two cases (14.3%) that were interpreted as equivocal, residual tumor was shown in both cases on reexcision. In three cases (21.4%), the MR imaging was interpreted as negative, but microscopic tumor was shown around seroma on reexcision. False-positive enhancement was seen in one case (7.1%). CONCLUSION: MR imaging showed more extensive tumor than conventional imaging and affected the clinical management in 16 (50%) of 32 patients with invasive lobular carcinoma. 相似文献
83.
84.
V. É. Orel Ya. Z. Popov E. K. Goraiskii I. V. Leshchinskii D. M. Khazanovich 《Biomedical engineering》1989,23(4):146-149
Kiev X-Radiology and Oncology Research Institute, Ministry of Health Care, Ukrainian SSR. Translated from Meditsinskaya Tekhnika,
No. 4, pp. 34–37, July–August 1989. 相似文献
85.
86.
CH Reynolds BBSc DP Crewther PhD SG Crewther PhD SJ West BSc 《Clinical & experimental ophthalmology》1998,26(S1):S117-S119
87.
SG Gotha 《MedR Medizinrecht》2006,24(8):497-502
Abstrakt 1. Für die Berechtigung der Krankenkasse zum Einbehalt der Anschubfinanzierung kommt es auf bereits geschlossene IV-Vertr?ge
an.
2. Apotheken geh?ren nicht zu den nach § 140b SGB V zum Vertragsabschluss berechtigten Leistungserbringern.
3. Zum Sinn und Zweck einer Integrierten Versorgung. (Leits?tze des Bearbeiters) 相似文献
88.
N I Perevodchikova L E Denisov N F Orel N B Trofimova L M Iarygin 《Voprosy onkologii》1987,33(10):73-75
Scalp cooling to prevent alopecia was used in 47 patients treated with anthracyclines for various tumors. Good results were obtained though the course included cyclophosphamide which also causes alopecia. Total beneficial (good + satisfactory) effect was recorded in 36 patients (74.4%) who did not need a wig. 相似文献
89.
90.
SG Freiburg 《MedR Medizinrecht》2005,23(4):251-252
Abstrakt Im Einzelfall kann im Rahmen einer Behandlung am selben Tag der Ansatz sowohl der Nr. 17 EBM als auch der Nr. 19 gerechtfertigt sein. (Leitsatz des Bearbeiters) 相似文献